2C+Ca=CaC2
CaC2+2HOH=Ca(OH)2+C2H2
2C2H2+5O2=4CO2+2H2O
CO2+K2CO3+H2O=2KHCO3
KHCO3+KOH=K2CO3+H2O
K2CO3+BaCl2=BaCO3+2KCl
2C+Ca=CaC2
CaC2+2HOH=Ca(OH)2+C2H2
2C2H2+5O2=4CO2+2H2O
CO2+K2CO3+H2O=2KHCO3
KHCO3+KOH=K2CO3+H2O
K2CO3+BaCl2=BaCO3+2KCl